Sodium, serum

Preferred Specimen(s) 1 mL serum

Transport Container Plastic screw-cap vial

Transport Temperature

Ambient 5 days,
Refrigerated 14 days

Reject Criteria

Gross hemolysis
Anticoagulants other than heparin

Methodology Ion Selective Electrode (ISE)

Clinical Significance Sodium measurements are useful in the diagnosis and treatment of aldosteronism, diabetes insipidus, adrenal hypertension, Addison’s disease, dehydration, inappropriate antidiuretic hormone secretion, or other diseases involving electrolyte imbalance.